Copper based brazing filler metal

The ARGENTELTM range of products are designed for the brazing of steel or copper components and also for brazing steel to tungsten carbide in tooling applications. Additions of tin, silicon and manganese allow control of fillet, flow, penetration and surface appearance.

ARGENTEL is often used for bronze welding.

Copper based brazing filler metals

Cu

ISO 17672

Melting Range

99.9

Cu 110

1081oC

Tough pitch copper is an effective and inexpensive brazing filler metal for use when brazing all types of steels, as well as tungsten carbide in reducing atmosphere type brazing operations. Copper is very fluid when molten and when brazing carbon steel an interference type joints fit is required. For brazing stainless steel joint gaps in the range 0.025 to 0.076 mm are recommended.

AMS/AWS A5.8
BCu-1

EN1044:1999
CU101

Cu

ISO 17672

Melting Range

99.5

Cu 110

1081oC

OFHC (oxygen-free high conductivity copper) is used for the vacuum furnace brazing of all types steels, nickel alloys and tungsten carbide. The same joint clearances for steel apply as above. As molten copper under a vacuum of 1 x 10-4 becomes violate a partial pressure vacuum brazing technique is commonly employed to suppress vaporisation.

EN1044:1999
CU101

Cu

Zn

Ni

Si

ISO 17672

Melting Range

48

42.25

9.5

0.25

Cu 773

890 - 920oC

ARGENTEL is a braze/bronze welding alloy that contains nickel, which makes the alloy stronger and harder but less fluid when molten than a standard Cu-Zn filler metal such as ARGENTEL No.1 or ARGENTEL 303.

EN1044:1999
CU305

Cu

Zn

Mn

Sn

Si

Melting Range

60

39.35

0.15

0.2

0.3

870 - 900oC

ARGENTEL 303 and products of similar composition contain controlled additions of tin and silicon. This improves the flow and surface appearance and gives reasonable filler metal penetration. See note on specifications below.

EN1044:1999
CU303

Cu

Zn

Ni

Mn

Si

Melting Range

54.5

40

4.9

0.3

0.3

890 - 910oC

This filler metal is more fluid than ARGENTEL when molten. It is not as strong or hard and is more suited to applications, which are of the true brazing nature such as joints on cycle frames and in steel furniture.

Cu

Zn

Si

ISO 17672

Melting Range

60

39.7

0.3

Cu 470a

875 - 895oC

ARGENTEL No. 1 and products of a similar composition (e.g. JM CZ6) are designed for use in a braze/bronze welding process joining steel components and also for brazing steel to tungsten carbide in tooling applications. See note on specifications below.